1. Preheat oven to 250 F. Combine dry ingredients in a large bowl. Stir well.
2. Combine honey, brown sugar, and oil in a small saucepan. Cook over medium heat, stir until sugar melts. Remove from heat; add peanut butter and vanilla and stir well. Drizzle over oat mixture; toss gently to coat well.
3. Spread mixture evenly on a greased baking sheet. Bake 40 minutes, add raisins. Stir gently and bake 15 minutes. Let granola cool completely. Store in airtight container.